Dimming control scheme based on hybrid LACO-SCFDM for visible light communications Download: 600次
1 Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
2 Institute of Electronic and Information Industry, China Center for Information Industry Development, Beijing 100876, China
3 Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
Figures & Tables
Fig. 1. Schematic of the proposed HLACO-SCFDM dimming method.
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Fig. 2. (a) BER characteristics of HLACO-SCFDM and HLACO-OFDM versus the scaling factor with different spectral efficiencies. Inserts show the first-layer signal decoding constellations, respectively. (b) SNR on different subcarriers for points A and B.
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Fig. 3. Analysis of spectral efficiency versus for different layers of (a) HLACO-OFDM and (b) HLACO-SCFDM.
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Fig. 4. Analysis of spectral efficiency versus for HLACO-SCFDM, HLACO-OFDM, hybrid HACO-OFDM, DCO-OFDM, and AHO-SCFDM.
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Table1. Simulation Parameters
Parameters | Values | Parameters | Values |
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Number of subcarriers | 256 | Signal bandwidth | 100 MHz | Cyclic prefix | 16 | Low-pass filter bandwidth | 10 MHz | Number of symbols | 512 | Noise power | | Training sequences | 10 | Target BER | |
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Table2. Computational Complexity
Dimmable Scheme | Transmitter | Receiver |
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HLACO-SCFDM | | | HLACO-OFDM[16] | | | AHO-SCFDM[18] | | | DCO-OFDM[17] | | |
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Siqiao Li, Tiantian Zhang, Yaojun Qiao, Ji Zhou. Dimming control scheme based on hybrid LACO-SCFDM for visible light communications[J]. Chinese Optics Letters, 2021, 19(4): 040601.